/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.gmr.web.multipart;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileItemFactory;

/**
 *
 * <p>
 * The class is an implementation of the {@link org.apache.commons.fileupload.FileItemFactory} interface.
 *
 * <p>
 * maxInMemorySize is set to Integer.MAX_VALUE by default.
 *
 * @author kernel164
 */
public class GFileItemFactory implements FileItemFactory {
	/** Thresold file size in Memory is set to max file upload size (default is max integer value). */
	private int sizeThreshold = Integer.MAX_VALUE;

	/**
	 * Create a new {@link GFileItem} instance from the supplied parameters and the local factory configuration.
	 *
	 * @param fieldName The name of the form field.
	 * @param contentType The content type of the form field.
	 * @param isFormField <code>true</code> if this is a plain form field; <code>false</code> otherwise.
	 * @param fileName The name of the uploaded file, if any, as supplied by the browser or other client.
	 *
	 * @return The newly created file item.
	 */
	public FileItem createItem(String fieldName, String contentType, boolean isFormField, String fileName) {
		return new GFileItem(fieldName, contentType, isFormField, fileName, sizeThreshold);
	}

	/**
	 * Sets the size threshold to store the data in memory, beyond that GFileItem will throw error,
	 * as file handling is not supported in GAE.
	 *
	 * @param sizeThreshold The size threshold, in bytes.
	 *
	 * @see #getSizeThreshold()
	 */
	public void setSizeThreshold(int sizeThreshold) {
		this.sizeThreshold = sizeThreshold;
	}

	/**
	 * Returns the size threshold beyond which files are written directly to disk. The default value is Integer.MAX_VALUE bytes (2 GB approx).
	 *
	 * @return The size threshold, in bytes.
	 *
	 * @see #setSizeThreshold(int)
	 */
	public int getSizeThreshold() {
		return sizeThreshold;
	}
}
